Add Hash#has_value?

[kachick]

• Ruby has has_value?. Is it a rejected one in crystal?
• If it is reasonable, should I add Env#has_value? and SimpleHash#has_value?? ref: Drop SimpleHash (Was: SimpleHash and other hashes) #2331

[Sija]

@ruza-net hmm, it ain't GitHub flavored Markdown version, it's being parsed by Crystal doc generator which doesn't support it, I think... I misunderstood your comment, my bad!

[MaloJaffre]

@ruza-net, it isn't the same thing: your version compares only the first value.

[ruza-net]

@MaloJaffre I don't understand you properly.

[ruza-net]

Oh I see, the stmt gets executed only if the expression is true, mine return bool immediately. My bad I was programming in Python a Long time :)

[kachick]

Thank you all! Make sure the pattern in 3e80dbc.

[asterite]

@kachick Thank you!

[kachick]

Thanks to merge! :)